Patents by Inventor Hong-Yih Chang

Hong-Yih Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9638498
    Abstract: A cartridge of a non-lethal weapon includes a housing in a launching device and including an internal space, a piercing member on a rear end of the space, a channel through the piercing member to communicate the space with at least one projectile, a metal sleeve at a front end of the space, and internal threads on an inner surface of the sleeve wherein the sleeve, the piercing member, and the housing are formed integrally; a high-pressure air canister in the space; a cap including two front through holes, external threads adjacent to the through holes, an internal primer between the through holes, and at least one spacer between the primer and the air canister wherein the cap is in the sleeve with the external threads and the internal threads secured together; and a first washer sandwiched by and between the cap and the inner surface of the space.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: May 2, 2017
    Inventor: Hong Yih Chang
  • Publication number: 20160258718
    Abstract: A cartridge of a non-lethal weapon includes a housing in a launching device and including an internal space, a piercing member on a rear end of the space, a channel through the piercing member to communicate the space with at least one projectile, a metal sleeve at a front end of the space, and internal threads on an inner surface of the sleeve wherein the sleeve, the piercing member, and the housing are formed integrally; a high-pressure air canister in the space; a cap including two front through holes, external threads adjacent to the through holes, an internal primer between the through holes, and at least one spacer between the primer and the air canister wherein the cap is in the sleeve with the external threads and the internal threads secured together; and a first washer sandwiched by and between the cap and the inner surface of the space.
    Type: Application
    Filed: February 19, 2016
    Publication date: September 8, 2016
    Inventor: Hong Yih Chang
  • Patent number: 5392029
    Abstract: An electrical shock apparatus includes a power source, a high voltage generation device for generating a very high voltage to shock a robber in response to a connection to the power source, an alarm device for generating an alarming sound to shock a robber in response to a connection to the power source, a function selection switch switchably connecting the power source to either the high voltage generation device, the alarm device, or an empty connection. A pin-socket switch is connected between the power source, the function selection switch, and the alarm device. The pin-socket switch includes a socket and a pin removably received in the socket. Normally, the pin of the pin-socket switch is retained in the socket and electrically connects the function selection switch to the power source yet separates the alarm device from the power source. The function selection switch electrically connects the power source to the empty connection via the pin-socket switch in normal condition.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: February 21, 1995
    Inventor: Hong-Yih Chang